1. The width of the channel was measured at numerous sections along the channel using a vernier calliper so as to achieve an average width of the channel.

2. The depth of the channel was determined with a ruler.3. The channel was filled to a uniform depth with gravel using a small plastic scoop. The coarsest

sample of gravel was used in the first place.4. The gravel surface was tamped down and levelled by means of the levelling tool with the top of

the overspill weir.5. The slope of the channel was set t 6% by manipulating the handwheel.6. The catch tank was filled with clean water up to the “full” mark.7. The recirculation pump was set to speed 3.8. The pump was switched on to allow water to start flowing in the channel.9. The flow in the channel was allowed to stabilise for approximately 2 minutes.10. The height of water above the crest of the weir was measured at the 3 distinct sections using the

point gauge.11. The readings of the vernier scale of the point gauge were noted at that same 3 distinct section s

was noted.12. The discharge of the flow was determined by collecting an appropriate volume of water in

container during a measured lapse of time.13. The time was controlled using a digital stopwatch whilst the volume of water collected was

determined using measuring cylinders.14. The discharge was determined 3 times for the set up and noted.15. Step 3, 4, 8-14 was repeated by replacing the sample of gravel which was less coarse.